DYALOG_INITSESSION

Whether Session initialisation activities are performed when Dyalog is started. Session initialisation populates ⎕SE, so that tools and functionality such as Link, SALT, user commands, and the numeric editor can work, together with everything related to ⎕SE.Dyalog: event hooks, editor callbacks, output modification, serial number registration, and the collection of utilities listed by ⎕SE.Dyalog.Utils.⎕NL-⍳9.

Valid values are:

• 0 – Session initialisation activities are not performed when Dyalog is started, and the DYALOGLINK, DYALOGSTARTUP, DYALOGSTARTUPSE, and DYALOGSTARTUP_X parameters are ignored.
• 1 – Session initialisation activities are performed when Dyalog is started.

The default is 1 for development interpreters, and 0 for runtime interpreters and the shell script interpreters.

Which value to set depends on how you run Dyalog:

• If you use a runtime interpreter to distribute your application, you do not need to change the default. If you use one on a machine that you control, and you want the affected tools, set DYALOG_INITSESSION to 1; this lengthens the start-up process.
• If you use shell scripts for deployment, you do not need to change the default. If you use shell scripts as an alternative to the interactive interface, set DYALOG_INITSESSION to 1.
• If you are developing an application that is intended to run with a runtime interpreter, set DYALOG_INITSESSION to 0 for the development interpreter so that it emulates the runtime environment. This identifies any inadvertent calls to tools that a runtime interpreter does not provide.